LXR linux/drivers/net/ethernet/mellanox/mlx5/core/mr.c

   1/*
   2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32
  33#include <linux/kernel.h>
  34#include <linux/module.h>
  35#include <linux/mlx5/driver.h>
  36#include "mlx5_core.h"
  37
  38int mlx5_core_create_mkey(struct mlx5_core_dev *dev,
  39                          struct mlx5_core_mkey *mkey,
  40                          u32 *in, int inlen)
  41{
  42        u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {};
  43        u32 mkey_index;
  44        void *mkc;
  45        int err;
  46
  47        MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);
  48
  49        err = mlx5_cmd_exec(dev, in, inlen, lout, sizeof(lout));
  50        if (err)
  51                return err;
  52
  53        mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
  54        mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
  55        mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
  56        mkey->size = MLX5_GET64(mkc, mkc, len);
  57        mkey->key = (u32)mlx5_mkey_variant(mkey->key) | mlx5_idx_to_mkey(mkey_index);
  58        mkey->pd = MLX5_GET(mkc, mkc, pd);
  59        init_waitqueue_head(&mkey->wait);
  60
  61        mlx5_core_dbg(dev, "out 0x%x, mkey 0x%x\n", mkey_index, mkey->key);
  62        return 0;
  63}
  64EXPORT_SYMBOL(mlx5_core_create_mkey);
  65
  66int mlx5_core_destroy_mkey(struct mlx5_core_dev *dev,
  67                           struct mlx5_core_mkey *mkey)
  68{
  69        u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {};
  70
  71        MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
  72        MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
  73        return mlx5_cmd_exec_in(dev, destroy_mkey, in);
  74}
  75EXPORT_SYMBOL(mlx5_core_destroy_mkey);
  76
  77int mlx5_core_query_mkey(struct mlx5_core_dev *dev, struct mlx5_core_mkey *mkey,
  78                         u32 *out, int outlen)
  79{
  80        u32 in[MLX5_ST_SZ_DW(query_mkey_in)] = {};
  81
  82        memset(out, 0, outlen);
  83        MLX5_SET(query_mkey_in, in, opcode, MLX5_CMD_OP_QUERY_MKEY);
  84        MLX5_SET(query_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
  85        return mlx5_cmd_exec(dev, in, sizeof(in), out, outlen);
  86}
  87EXPORT_SYMBOL(mlx5_core_query_mkey);
  88
  89static inline u32 mlx5_get_psv(u32 *out, int psv_index)
  90{
  91        switch (psv_index) {
  92        case 1: return MLX5_GET(create_psv_out, out, psv1_index);
  93        case 2: return MLX5_GET(create_psv_out, out, psv2_index);
  94        case 3: return MLX5_GET(create_psv_out, out, psv3_index);
  95        default: return MLX5_GET(create_psv_out, out, psv0_index);
  96        }
  97}
  98
  99int mlx5_core_create_psv(struct mlx5_core_dev *dev, u32 pdn,
 100                         int npsvs, u32 *sig_index)
 101{
 102        u32 out[MLX5_ST_SZ_DW(create_psv_out)] = {};
 103        u32 in[MLX5_ST_SZ_DW(create_psv_in)] = {};
 104        int i, err;
 105
 106        if (npsvs > MLX5_MAX_PSVS)
 107                return -EINVAL;
 108
 109        MLX5_SET(create_psv_in, in, opcode, MLX5_CMD_OP_CREATE_PSV);
 110        MLX5_SET(create_psv_in, in, pd, pdn);
 111        MLX5_SET(create_psv_in, in, num_psv, npsvs);
 112
 113        err = mlx5_cmd_exec_inout(dev, create_psv, in, out);
 114        if (err)
 115                return err;
 116
 117        for (i = 0; i < npsvs; i++)
 118                sig_index[i] = mlx5_get_psv(out, i);
 119
 120        return err;
 121}
 122EXPORT_SYMBOL(mlx5_core_create_psv);
 123
 124int mlx5_core_destroy_psv(struct mlx5_core_dev *dev, int psv_num)
 125{
 126        u32 in[MLX5_ST_SZ_DW(destroy_psv_in)] = {};
 127
 128        MLX5_SET(destroy_psv_in, in, opcode, MLX5_CMD_OP_DESTROY_PSV);
 129        MLX5_SET(destroy_psv_in, in, psvn, psv_num);
 130        return mlx5_cmd_exec_in(dev, destroy_psv, in);
 131}
 132EXPORT_SYMBOL(mlx5_core_destroy_psv);
 133